UWB ranging control device and UWB ranging method using the same

Abstract

Disclosed is an ultra-wideband (UWB) system and, more particularly, a UWB system capable of optimizing UWB operation for vehicles through hopping. The UWB system includes a memory in which a UWB communication program is embedded and a processor which executes the program. The processor performs UWB time-hopping and frequency-hopping to establish a communication channel.

What is claimed is: 
     
       1. An ultra-wide band (UWB) ranging control device comprising:
 a memory storing a UWB ranging program; and 
 a processor configured to execute the UWB ranging program, 
 wherein the processor extracts combinations of UWB anchors installed in a vehicle, the UWB anchors configured to detect a device, the combinations extracted according to correspondence between each of the combinations and each of the operation scenarios, 
 wherein the processor controls a ranging operation comprising performing primary ranging using UWB anchors assigned first priority among the extracted combinations of UWB anchors, and wherein the UWB ranging program performs time-hopping and frequency-hopping in an alternating pattern, the alternating pattern alternating between time-hopping and frequency-hopping, and 
 wherein the processor transmits a wake-up signal for the combinations of UWB anchors according to the operation scenarios, the operation scenarios including driver seat passive keyless entry (PKE), passenger seat PKE, passive trunk, and passive start. 
 
     
     
       2. The UWB ranging control device of  claim 1 , wherein a combination of UWB anchors comprises a pair of first UWB modules and a pair of second UWB modules, and wherein, when the device is detected, by the combination of UWB anchors, in a region corresponding to the driver seat PKE operation scenario, driver seat PKE is enabled and the processor performs ranging using at least one of the pair of first UWB modules and the pair of second UWB modules, wherein the pair of first UWB modules is disposed on a first bumper on a driver's side and a second bumper on a side behind the driver's seat and wherein the pair of second UWB modules is disposed on a roof of the vehicle. 
     
     
       3. The UWB ranging control device of  claim 2 , wherein the processor performs ranging using the pair of first UWB modules in a primary operation and performs additional ranging using the pair of second UWB modules in a secondary operation when the ranging performed in the primary operation fails. 
     
     
       4. The UWB ranging control device of  claim 1 , wherein the processor controls primary ranging to be performed using UWB anchors determined to optimize detecting a device according to an operation scenario and thus assigned first priority, and controls secondary ranging to be performed thereafter using UWB anchors assigned second priority when a result of primary ranging indicates a failure. 
     
     
       5. The UWB ranging control device of  claim 4 , wherein the processor determines whether smart key hacking defense is necessary based on at least one of a result of the primary ranging and a result of the secondary ranging and determines whether to perform an operation. 
     
     
       6. An ultra-wide band (UWB) ranging method comprising:
 (a) extracting combinations of UWB anchors installed in a vehicle, the UWB anchors configured to detect a device, the combinations extracted according to correspondence between each of the combinations and each of the operation scenarios; 
 (b) performing primary ranging using UWB anchors assigned first priority among the extracted combinations of UWB anchors; and 
 (c) performing secondary ranging using UWB anchors assigned second priority among the extracted combinations of UWB anchors, 
 wherein at least one of the primary ranging and the secondary ranging performs time-hopping and frequency-hopping in an alternating pattern, the alternating pattern alternating between time-hopping and frequency-hopping, and 
 wherein the method further comprises:
 (d) transmitting a wake-up signal for the combinations of UWB anchors according to the operation scenarios, the operation scenarios including driver seat passive keyless entry (PKE), passenger seat PKE, passive trunk, and passive start. 
 
 
     
     
       7. The UWB ranging method of  claim 6 , wherein, when the device is detected, by the UWB anchors, in a region corresponding to the driver seat PKE operation scenario, driver seat PKE is enabled, and wherein (a) comprises extracting, as the combinations of UWB anchors, a pair of first UWB modules and a pair of second UWB modules, wherein the pair of first UWB modules is disposed on a first bumper on a driver's side and a second bumper on a side behind the driver's seat and wherein the pair of second UWB modules is disposed on a roof of the vehicle. 
     
     
       8. The UWB ranging method of  claim 7 , wherein (b) comprises performing primary ranging using the pair of first UWB modules assigned first priority, and (c) comprises performing secondary ranging using the pair of second UWB modules assigned second priority when the primary ranging fails. 
     
     
       9. The UWB ranging method of  claim 6 , wherein (b) comprises performing primary ranging using UWB anchors optimized for detecting a device according to an operation scenario and thus assigned first priority, and transmitting a result of primary ranging to an integrated controller. 
     
     
       10. The UWB ranging method of  claim 9 , wherein, when the result of ranging in (b) indicates a failure, (c) comprises performing secondary ranging using UWB anchors assigned second priority.